Textadept

Engineered for speed, Textadept is a remarkably lightweight code editor that launches instantly and runs smoothly even on older hardware. It strips away unnecessary complexity to deliver a pure, responsive coding environment. Despite its lean footprint, it is packed with developer-centric features like configurable syntax highlighting and code autocompletion. Furthermore, its extensible design through Lua scripting allows you to add only the functionalities you require, ensuring a fast, focused, and highly personalized editing workflow tailored just for you.